I recently had the chance to play with my stepfather's Leica M-Summilux 35mm f/1.4, and I thought it might be of interest to compare this $7500 piece of glass to the Panasonic Leica 25mm f/1.4, which I own (and which costs a whole lot less). This is by no means a scientific comparison, however, it is interesting how close these two lenses are in rendition. I suspect they have similar internal construction. I have cropped the full size image from the 25mm to match as closely as possible the 35mm frame of view. I have also included a 100% crop of each image for pixel peepers. Both images were taken with the E-M5 at ISO 500 and 1/80 shutter, wide open at f/1.4. Hope someone finds this interesting! What do you think of the differences, given that one lens costs 10 times the other? Can you guess which is which?